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February 22, 2026ACS Nano1 citations

Flexible Superomniphobic Surface Enabling Ultrafast Shattering of Organic Droplets under Extreme Impacts

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HAHyunah AhnGYGeun-Tae YunBJByungeun Jeon

Key Points

  • The aim is to create superomniphobic surfaces that effectively repel diverse liquids under dynamic conditions.
  • Development of a flexible, springtail-inspired surface design with an optimized solid fraction.
  • Testing the surface under high-speed impacts with various organic droplets.
  • Analysis of droplet behavior during impact and subsequent retraction.
  • Achieved organic droplet shattering at impact velocities up to 4.4 m s –1, the highest for artificial superomniphobic surfaces.
  • Demonstrated reduction in contact time by approximately 59% during droplet rebound.
  • Observed hierarchical-structure-induced fragmentation that enhances surface performance.

Abstract

Achieving robust superomniphobic surfaces capable of repelling both high- and low-surface-tension liquids (e.g., water, organic solvents) under dynamic conditions remains a challenge. Nature-inspired structures, such as T-shaped or hierarchical architectures, advance static repellency but often fail under high-speed impacts, as minimized solid fractions reduce capillary pressure and allow liquid penetration. Here, we present a flexible, springtail-inspired superomniphobic surface with an optimized solid fraction (∼0.15) that unites strong static repellency with exceptional dynamic resistance. The surface sustains organic droplet shattering at impact velocities up to 4.4 m s –1 , the highest reported for artificial superomniphobic surfaces. Under extreme impacts, droplets undergo hierarchical-structure-induced fragmentation and rapid film rupture, enabling retraction-free rebound and an ∼59% reduction in contact time. This behavior reproduces the shattering dynamics of natural organisms and, in certain regimes, exceeds natural benchmarks. Our findings establish design principles for mechanically adaptive, impact-resilient superomniphobic surfaces with potential applications in protective coatings and self-cleaning materials.

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Cite This Study

Ahn et al. (2026) studied this question.

synapsesocial.com/papers/699a534bfdaf4e3c1268ec88https://doi.org/10.1021/acsnano.5c20943
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